Unifi products by Ubiquiti are the best and in my humble opinion the only choice at a low budget. You get enterprise quality for the price of home user top-grade. The management software, which comes with the product for free, is phenomenal let alone easy to use. Combine a unify access-point with the Security Gateway and/or the cloud-key to fully unleash its potential.
As far as the access-point is concerned, the AC Pro gives the best user-experience at the cost of a little range. On top of that, one can use the pro outdoors if protected from weather conditions. The access-point can be used for cold weather applications as well and works without problems at temperatures as low as -25. If you have a speaker system across your building, consider using the EDU version and phase out your old speaker system. All the unifi products work well with each other and are expandable with a single click. No hassles configuring what so ever... Just plug, click done!